org.foray.common
Class CharSequenceSubset

java.lang.Object
  org.foray.common.CharSequenceSubset

All Implemented Interfaces:

Serializable, CharSequence

public class CharSequenceSubset
extends Object
implements Serializable, CharSequence

A wrapper around another CharSequence, providing a view of a subset of that sequence. Caveat: One of the weaknesses of CharSequence interface is its lack of a method indicating whether the instance is mutable or immutable. This class tests dimensions at construction time, but if the wrapped CharSequence changes its size, this class will have no way of knowing it.

See Also:

Serialized Form

Constructor Summary

CharSequenceSubset(CharSequence wrappedSequence, int start, int length)
Constructor.

Method Summary

char	charAt(int index)
int	length()
CharSequence	subSequence(int start, int end)
String	toString() Overrides method in Object to properly conform to the CharSequence interface.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

CharSequenceSubset

public CharSequenceSubset(CharSequence wrappedSequence,
                          int start,
                          int length)

Constructor.

Parameters:

wrappedSequence - The encapsulated sequence, a subset of which is the content for this sequence.

start - The index to the first element in wrappedSequence that is considered to be part of this sequence.

length - The number of chars in wrappedSequence that is considered to be part of this sequence.

Method Detail

length

public int length()

Specified by:

length in interface CharSequence

toString

public String toString()

Overrides method in Object to properly conform to the CharSequence interface.

Specified by:

toString in interface CharSequence

Overrides:

toString in class Object

subSequence

public CharSequence subSequence(int start,
                                int end)

Specified by:

subSequence in interface CharSequence

charAt

public char charAt(int index)

Specified by:

charAt in interface CharSequence